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SELECT A DEVICE TO CALIBRATE
>SPRT 1
After the device is selected a new window appears showing the parameters and
functions available from the device. New values can be entered for the parame-
ters using the numeric buttons and pressing ENTER. The UD buttons can be
used to move between parameters.
For the 2560/2567 SPRT module the list of parameters includes 0_ADJ,
100_ADJ, and 400_ADJ as described above. The list also includes the calibra-
tion date (CAL DATE) parameter, used to record the date the module was cali-
brated, and the (SER NUM) parameter, used to record the serial number of the
module.
7.4.3
Calibration Procedure (2560)
Calibration requires adjustment of the 0_ADJ, 100_ADJ, and 400_ADJ parame-
ters at three specific input resistances. If the resistances used are approximately
0Ω, 100Ω and 400Ω respectively the adjustments are independent and the pro-
cedure is simple. The order in which the adjustments are performed is impor-
tant. The adjustment of the 400_ADJ parameter must be performed last as the
adjustments of 0_ADJ and 100_ADJ affect the measurement at 400Ω but
400_ADJ does not affect the measurements at 0Ω and 100Ω. Either channel
can be used for calibration. Set the conversion type to R(Ω) to display resis-
tance (see Section 5.2.1.1 ). The accuracy required of the resistance standards is
1/4 of the instrument accuracy: that is ±0.00012Ω at 0Ω, ±0.0005Ω (5 ppm) at
100Ω, and ±0.002Ω (5 ppm) at 400Ω. The recommended procedure is as
follows:
TCS
2
PRTS 3
CALIBRATE DEVICE: SPRT
0 ADJ: 0.0
100 ADJ: 0.0
400 ADJ: 0.0
CAL DATE: 05-21-96
SER NUM: A26123
7 2560/2567 SPRT Module
Calibration
117
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